BSM6-1 pouring type high voltage common box busway is especially developed for 6KV~40.5kv electric system and completely waterproof (IP68), fireproof, explosion prevention, resistant to corrosion of acid and alkali. It is suitable for use at indoor and outdoor severe places. One-time investment can obtain the excellent property of free maintenance more than 50 years and the benefit from the most economical investment. The copper conductor is poured in a wholly sealed manner in design to achieve the effect of “double fixation and never looseness” so as to provide the best guarantee for long-term safe operation for more than 50 years. It has more survivability and advantages than conventional common box bus.